Signments



(No Model.) J. S. SMART.

7 WATER FILTER.

Patented Jan. 9, 1883.

as I

N. PETERS, Phntn-Lilhugriphar. Washington. 0. c.

35 the spirit of my invention.

- UNITED STATES PATENT' OFFICE.

JAMES S. SMART, OF SALEM, MASSACHUSETTS, ASSIGNOR, BY MESNE AS- SIGNMENTS, TO THE AMERICAN FILTER COMPANY, OF PORTLAND, ME.

WATER-FILTER.

SPECIFICATION forming part of Letters Patent No. 270,255, dated January 9, 1883,

Application filedJnly sauna. (No model.)

Ioall whom ttmay concern:

Be it known that I, JAMES S. SMART, a citizen of the United-States, residing at Salem, in the county of Essex and State of Massachusetts, have invented certain new and useful Improvements in Water-Filters; and I do hereby declare that the same are fully described in the iollowing specification and illustrated in the accompanying drawings. This invention relates to improvements in water-filters, and especially to improvements in Letters Patent granted to meJune 20,1882, No. 259,725. It is carried out as follows, reference being bad to the accompanying drawr. ings, on which V Figure 1 represents a plan view. Fig. 2 represents a longitudinal section on the line A B, shown in Fig. 1. Fig. 3 represents a crosssection on the line C D, also shown in Fig.1, with the filter-plug in position for filtering the water. Fig. 4. represents a similar cross-section, with the filter-plug in position for washing the plug, and to allow a free passage for the water on both sides of the plug, and Fig. 2 5 5 represents a side elevation of the filter-plug as detached from the outer shell. Similar letters refer to similar parts wherever they occur on the different parts of the drawings. 0 a is the outer shell or chamber, preferably made spherical but I do not wish to confine myself to this particular shape, as it can to equal advantage be made cylindrical, bellshaped, or otherwise, without departing from Said outer shell, 0, has a screw-threaded collar, a, in its upper end, for attaching it to the screw-threaded end of a faucet, as usual.

a is the nozzle or outlet for the water, on

0 the under side of the shell at, as shown in Figs. 2, 3, and 4. In one piece with the shell or are cast the two division-walls or bearing-surfaces walls and the filter-plug 0; but said lips or flanges may bedispensed with and the divisionwalls or bearing-surfaces cast thicker, if so desired. The filter-plug c is inserted through the screw-threaded opening a into the shell on in such a manner that its slightly-tapering outer surface bears againstthebored-out inner edges of the division-walls b b, orfla'nges b b, as the case may be. The plngcisheld against 5 the bearing-surfaces by means of the screw threaded cap d, screwedinto the screw-thread ed side opening, a, in the shell a, and is proyided with packing-ring, cl, between the cap The cap at has a stuffing-box, 6o

cl and shell (1. d" d, on its outside, through which the spindle c of the plug 0 projects, said spindle being provided with a suitable handle, 0, in itsouterend, as usual, by means of which the plug 0 can be turned around its axis. The plug 0 is 6 made hollow for the reception of the filtering material 6, and is provided on two opposite sides with nettings ff, covering opening in said plug 0, as shown. The nettingsffare so placed over the openings in the plug c thatthe diameter of the plug from one netting to the other is less than the opening between the lower parts of the flanges b bf, thereby causing a free passage for the water when the plug c is in the position shown in Fig. 4. By this construction of the plug all sediment collected on the upper net-tingfand in the upper chamber, a, of the outer shell, (t,.iS washed away when the plug 0 is in the position shown in Fig. 4.

c is a detachable screw-threaded coverin the inner end of the plug 0, which, when removed, allows for filling the hollow plug cwith thedesired filtering material; butsaid cover 0' may be dispensed with, as the filtering material 8 6 may be inserted through the opening in the plug by unscrewing the screwsfff, which hold the nettingfin place, and removing the netting.

This my improved filter is reversiblethat is, it may be turned around its axis- -so as to clean the filtering material, and to keep it from packing solid against the lower netting f by I causing the water to enter the plug 0 from the opposite nettingf to the one it last entered. 3

This my improved filter is very-simple in its construction and has many advantages over other filters. There are no shelves or recesses to collect and retain the sediment. The shell a, division-walls b b, and flanges b b being .cast in one piece, and the plug 0 being fitted water-tight vagainst the bored-out inner edges of the flanges b 1), thereby dispensing with the use of packing-rings and diaphragms, I am ahleto manufacture this myimproved filter very simple, cheap, durable, and not liable to get out of order.

This my improved filter may be reversed without first havingto shutoff the water, there being but slight friction between the moving parts, caused by the pressure of the water, as is the case with most other filters.

Having thus/ fully described the nature, operation, and construction of my invention, I Wish to 'claim- The herein-described filter, consisting of the shell or case a, with twointernal division-walls Y or bearing-surfaces, b b, with flanges b b for the hollow plug 0, with its strainers or nettings ff, arranged so as, to cause-a free passage-for the water between said strainers and bearingsurf'aces when the plug is turned on its axis, as set forth.

In testimony whereof I have affixed my signature in presence of two witnesses.

JAMES S. SMART. 

